\xf9\x0e \xcb\x10\xcd\x03\x80\x14\x12?\xd8\x15\x15\x1a\xa9\x12\xa1(\xf9S\x14\x1a\xcd\x00\x80\xb90\xf8\x10\xeev
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
Disassemble:
ORG 00000H LD SP,HL ;0000 F9 . LD C,020H ;0001 0E 20 . RL B ;0003 CB 10 . . CALL 08003H ;0005 CD 03 80 . . . INC D ;0008 14 . LD (DE),A ;0009 12 . CCF ;000A 3F ? RET C ;000B D8 . DEC D ;000C 15 . DEC D ;000D 15 . LD A,(DE) ;000E 1A . XOR C ;000F A9 . LD (DE),A ;0010 12 . AND C ;0011 A1 . JR Z,$-5 ;0012 28 F9 ( . LD D,E ;0014 53 S INC D ;0015 14 . LD A,(DE) ;0016 1A . CALL 08000H ;0017 CD 00 80 . . . CP C ;001A B9 . JR NC,$-6 ;001B 30 F8 0 . DJNZ $-16 ;001D 10 EE . . HALT ;001F 76 V